Underwater breathing apparatus



FIG. 1 is a top perspective view of an underwater breathing apparatus showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The bottom and rear of the underwater breathing apparatus of my new design are unornamented and not considered part of the design. The broken lines in FIGS. 4 and 6 define the bounds of the claimed design and form no part thereof. 

The ornamental design for a underwater breathing apparatus, as shown and described. 